It varies so don't put pressure on yourself.
I think the most important thing to being independent is learning how to do house work (e.g. ask a friend or family how to do the washing machine and hand wash and iron), and how to cook.
You don't have to be a master chef or fancy cook - just enough to get buy healthily.
There are many cook books like Jamie Oliver, free websites (I like BBC good food), and things like Hello Fresh, Gusto (there are many others) that you can do temporarily to get the hang of it as they show you step by step. There's also cooking classes where you might also meet friends.